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33 Cards in this Set

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  • Back
Contamination
presence of any microorganism (common)
Infection
colonization of bugs (less common and not necessarily damaging)
Pathogen
infectious disease agent
Virulence
ability to cause infection and damage
Dose
number of cells of a contaminant
Two types of resistance
innate
acquired
3 types of innate resistance
physical (skin, mucous memb)
mechanincal (secretions, cilia)
chemical (stomach acid)
type of acquired resistance
cell-mediated (antibodies)
Immunity
being able to resist a particular disease, esp through preventing dev. of a pathogenic microorganism
Sanitization
physical cleaning to reduce the quantity of microbes and bioburden
done before sterilization/disinfection
(disinfectants and paper towels on surfaces, soap and brush on instruments, ultrasonic on instruments)
Sterilization
destruction of all microbial forms
3 types of sterilization
heat (most common
filtration
radiation
Disinfection
destruction of pathogenic microbes (infectious disease agents)
*doesn't destroy spores and certain resistant microorganisms
*target for cubical preparation
High-level disinfectant
destroys all microbial life
also called chemical "sterilants"
Intermidiate-level disinfectant
Used for disinfecting dental operatory surfaces
destroys mycobacterium tuberculosis, viruses, fungi, vegetative bacteria
Low level disinfectant
Used on floors and walls
kills some viruses and fungi
Tuberculocidal
kills mycobacterium tuberculosis
Asepsis
condition in which infective material is absent
(after disinfectant occurs)
antiseptics
Used on living tissue to work against bad organisms: alcohol coagulates the protein in bacteria
Critical items
pierce the skin or mucosa and need sterilization
Semi-critical items
non sharp items that enter the oral cavity and need sterilization
Non-critical items
don't enter the oral cavity, but may be touched, require disinfection (counter, chair,etc)
Source
infected individual
Infection requirements:
susceptible host
sufficient no of pathogen
portal of entry
Modes of transmission
direct
indirect
droplet
inhalation
Stages of an infectious disease
incubation
prodromal
acute
convalescent
Incubation
initial entrance to first symptoms
Prodromal
appearance of early symptoms
Acute
greatest amount of symptoms
convalescent
recovery
3 ways to control microbial growth
bacteriostatic
bactericidal
removal
Bacteriostatic
inhibition of growth
Bactericidal
killing microorganisms